Tiritiri Matangi Island lies in the Hauraki Gulf of New Zealand, 3.4 km (2.1 mi) east of the Whangaparaoa Peninsula in the North Island and 30 km (19 mi) north east of Auckland. The 2.2 km² (1 sq mi) island is an open nature reserve managed under the supervision of the Department of Conservation and is noted for its bird life, including kiwi and takahē.